If you have to conduct maintenance tasks to your Husaberg FS650E then it will always be recommended to own a Workshop Manual for a reference in the event that you need to know the best ways to take off a specific part like the Gearbox and match it again adequately.
Husaberg FS650E Workshop Manuals offers clear precise diagnostic guidelines with regards to your car so if something is playing up it can help you find out what the problem is and easy methods to repair it. You will be able to decide if you can do this by yourself or if the job is just too big you can make a booking for your FS650E in to a decent friendly mechanic.
Husaberg FS650E manual